config(bash): add wp-cli bash completions

bash/_completions/wp

@@ -0,0 +1,23 @@
+# bash completion for the `wp` command
+
+_wp_complete() {
+	local OLD_IFS="$IFS"
+	local cur=${COMP_WORDS[COMP_CWORD]}
+
+	IFS=$'\n';  # want to preserve spaces at the end
+	local opts="$(wp cli completions --line="$COMP_LINE" --point="$COMP_POINT")"
+
+	if [[ "$opts" =~ \<file\>\s* ]]
+	then
+		COMPREPLY=( $(compgen -f -- $cur) )
+	elif [[ $opts = "" ]]
+	then
+		COMPREPLY=( $(compgen -f -- $cur) )
+	else
+		COMPREPLY=( ${opts[*]} )
+	fi
+
+	IFS="$OLD_IFS"
+	return 0
+}
+complete -o nospace -F _wp_complete wp

bash/completions

@@ -95,7 +95,7 @@ SSH_COMPLETE=("$(cut -f1 -d' ' ~/.ssh/known_hosts |\
                  grep -e '[[:alpha:]]')")
 complete -o default -W "${SSH_COMPLETE[*]}" ssh
 
-for FILE in "${DOTFILES_PATH}"/bash/_completions/{hugo,netlify,npm,robo}; do
+for FILE in "${DOTFILES_PATH}"/bash/_completions/{hugo,netlify,npm,robo,wp}; do
   # this routine ranges through a folder of files that we don't explicitly know (@davidsneighbour)
   # see https://github.com/koalaman/shellcheck/wiki/SC1090
   # shellcheck source-path=SOURCEDIR/completions